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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //单例模式
        var Singleton = function(name) {
            this.name = name
            this.instance = null
        };
        Singleton.prototype.getName = function() {
            return this.name;
        };
        // 获取实例对象
        Singleton.getInstance = function(name) {
                if (!this.instance) {
                    this.instance = new Singleton(name)
                }
                return this.instance
            }
            //测试单例模式的实例
        var a = Singleton.getInstance('aa')
        var b = Singleton.getInstance('bb')
    </script>
</body>

</html>